Bending and straightening device



May 24, 1932. P, T, BYNUM 1,860,171

BENDING AND STRAIGHTENING DEVICE Filed May 29, 1931 Rio Patented May 24, 1932 r rf F icE 1 PINK '1. BYNUM, or GALLIHAM, 'rnxAs BENDING AND STRAIGHTENING DEVICE Application fi led May 29,

I This invention relates to bending and straightening devices adapted to straighten a frame or axle on a motor vehicle without removing the fenders, running boards or' 5 motor from the chassis, as well as to' straighten twisted and bent axles wlthout re moving the same from the auto or truck.

A further obj ect of the invention is to provide a device which j may be used to straighten bends or remove warps or twists from variousmetal elements, such as axles,

shafts, crank shafts, angle irons, channel and bar steel,'and pipe.

A further object is to provide a device in cluding a stress bar which maybe placed longitudinally of the member to be straightened and is equipped with a yoke which carries a post and jack screw, the stress bar being of' such construction as to be strong and rigid and permit of the yoke being extended in various directions from the bar to accommodate the bar to the work which must be performed. v

A still further object is to provide a straightening device in which the post carrying the jack'screw is adjustably secured in the legs thereof so that it can be moved to-.

ward or away from the stress bar to accom modate the device to various applications'to straighten a bent metal member.

"With the above and other objects in view the invention consists in certain novel. de-- tails of construction and combinations of parts hereinafter fully described and claimed, it being understood that. various modifications may be resorted to within the scope of the appended claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings forming part of this specification, V

Figure 1 is a perspective view of bending and straightening devices in position to straighten a chassis frame,

Fig. 2 is a vertical sectional view through the device in applied position, V

Fig. 3 is a plan view of a plurality of the devices applied alternately to oppositesides of the Work, and

a pair of stood.

1931. Serial No. 541,674.

Fig.4 isa fragmenta y perspective viewv showing a curvedstressbar; i Referring now, to. the ,dr'awingsin' which like characters'of reference designate similar channel 'iron'chassis frame memberto which my. invention is applied for the vpurpose of illustration. 7 a In carrying outlthe inventionfl provide a stress bar .llvvhich preferably is hollowand preferably is also rectangular in cross 'sec- 7 tion to provide a plurality of. faces disposed atanangle to each other. The-stress bar is preferably formed of metal and maybe; either straight longitudinally, 'asshown in 05 Fig. 1, or curved longitudinally, "as shown at 12 in Fig. 4. w I Mounted on thestress bar is a' yoke 13 ,which preferably is U-shaped in contour and -w' may be formed of any'suitjablestrapmetal;

In the present embodiment of the invention, the yoke embraces three sidesof the rectan Y gular stress bar, and the legs 1410f the yoke project beyond the fourth sideof the bar and,.

consequently, extend 1 outwardly. from" the same side of the stress bar. ,The .yokegmay be. disposed on" ,the stress.=.barto extend laterallytherefromforupwardly or downwardly, these four. positions of theyoke per- V 7 mitting of application of the device to .various types of work to be performed. If

A substantially rectangular solid post 7 15 isloosely fitted in correspondingly. shaped openings 16 formed int he legs of the yoke};

The post extends, perpendicular to". thele s and may be slid upwardly or downwardly 1n said openings. 1 Each leg is. equipped with r a 1ug-17 and a set screw. 18 which;passes: through they lug, both lugs extendingfper---- pendicular "to the legs. .The set s'c'r ews 18 I may be adjusted; as desired to hold the post snugly against the inneri edges, 19 of the,

openings 16 and maintain the post at any adjusted position therein, ,as will, be under Thepfost is equipped'with' ack'screw 20 which extends parallel to the'legs of the yoke f and is adapted to be forced againstthemem- "ber 10 to be straightened. i V In practice, three such 'de parts in the various views, 10 designatesa 85 turnedinopposite directions'on the stress ill beeasily and quickly straightened.

bar 11-, as best shown in Fig. 3, with the posts '15 disposed on alternatesides of the member 10 to be straightened. Thus, the jack screws oppose each other and, during uniform v t ghtening of the 3ack screws, the member 10 It will be observed that the yokes 13 may be adjusted longitudinally, of the straight stress bar 11 or curved stress bar 12, as-the case may be, and that the post '15 may beadposition.

'justed vertically in. the yoke to any desired In general, it may be said that the part or member to be bent,straightened-or twisted may be placed longitudinally of or parallel with the stress bar-"and between the jack screws of the posts, andth'at' thejack screws may be adjusted to bearon whatever part of the work it is desired 'tostraighten.

i f-To removeitwists, it "is found desirable to .y'use four ,ofthe bending and straightening I further explanation,

' devi ces'," one pair being, used to 1 reverse the strain of the'other pair.

, j =Having"thus described the inv-ention, l 0

'claim:,"" is 1. V-Abending and straightening device inthe -l'e'gs' projecting-from thesame side j'of the egs a i 2. A bendingandstraightening device ini .ic ludinga stress bar having' outerface's "dis- "posed at-an' angle Withresp'eotto each other,

' fa yokeadapted to bedi'sposecl toembracethe bar'and bear upon'said faces, the angular 5 inclinationbffithe faces permitting of the yoke being disposed to'extend in various (ii-' 'rections from the bar,- apost 'adj'ustably mounted on the: legs of the yoke fand'extend ing perpendiculantosaid legs, and'fa 'jack lscrewcarriedflby said post.

3. A bending iandjjstraightening device in 'cluding 'afhollow' rectangular stress bar, a h

substantially U-shap'ed'yoke embracing the i 7' f-bar and havin gffthe "legs projecting beyond ithe same side the bar, a postrcarried by j the legs 'of'the yoke and extending perpen dicularitosaid legs, and ajack screw car- T ried by the POSt. I 60 openings and entendingiperpen'dicular tothe From the' abo've description, it is thought n "that the constructionand operation of my I invention will 'be 'fullyyunderstood' ithout" i i 4'. .Abending 'and'straightening device iii- ,cludingastressi bar, a yoke embracing the bar and having the. legs projectingffrom the same side of thebar, saidlegs'havi ng-alined openings therein, a postslidably'fitted in'said v I i 1,860,171"

legs, means for adjustably securing said post in said openings, and a serevv carriedby said post.

5. A bending and straightening device comprising a stressbar, yoke adapted totem-- brace the "stress bar andh'aving the legs .eX-

' tending from the sameside thereoflsaidlegs having openings therein, elu gs on the legs at V V the outer edges of said openings, setscrews carried by said lugs, a post slidably mounted' insaid-openi-ngs and clamped in adjusted po{ sitions against the inner edges'of said opencarried by said post. 1

In testimony w'hereof I 'aflix my signature,

,ings by said :setiscrews, and a jack screw PINK r. BY [a 7 

